www.czarmedia.net / They asked to provide card info, I refused

I wanted to register on the website www.czarmedia.net. But when I filled the form, they asked to provide the personal info and card info as well. I became suspicious about it and refused to fill this part. But they didn’t finish my registration and continued to send different emails and offers to me. I don’t like to provide such personal info to unknown people. Also I’m not sure that it was safe at all. Please, post your comments about them.